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Topic: Servos/wheels rotate automatically (Read 2364 times)

We are trying to bulid a robot for our project. We got 4 servos mount to the wheels, and the servos have been modify already. We also write a simple coding to test on the controlling of the servos. However, 2 of the wheels are just rotating automatically no matter what. With our coding, we can still change the speed of it, but we just can't make it stop. So we reset the board to erase all the code, which the servos/wheels should be stop, but those 2 wheels are just keep rotating. Does anyone know why?? We are thinking maybe there is some coding already set in the servo, but we are not sure.

Assuming that you are properly sending 1500 uS pulses to the servo, the servo position feedback potentiometers are not "centered" properly. When servos are modified for continuous rotation, the feedback pot is de-coupled from the output shaft. The pot must be set to the center position so that the output shaft doesn't rotate when given 1500 uS pulses. You can fix this by opening up the servo body and adjusting the pot.

We been "centered" the servos already. The model of the servos is HS 5625MG and connected to the mini dragon board. Someone told me, maybe the current between two are not compatible, so which may damage the servo.